Définition : Appendix II lists species that are not necessarily now threatened with extinction but that may become so unless trade is closely controlled. It also includes so-called "look-alike species", i.e. species whose specimens in trade look like those of species listed for conservation reasons. International trade in specimens of Appendix-II species may be authorized by the granting of an export permit or re-export certificate. No import permit is necessary for these species under CITES (although a permit is needed in some countries that have taken stricter measures than CITES requires). Permits or certificates should only be granted if the relevant authorities are satisfied that certain conditions are met, above all that trade will not be detrimental to the survival of the species in the wild. (See Article IV of the Convention)
Définition : veins run parallel and equidistant to each other for most of the length of the leaf; they may converge or fuse (anastomose) towards the apex
Définition : secondary vascular tissues with large amounts of softer storage cells (i.e. parenchyma) mixed with the wood or xylem cells. The stems of these plants are softer than the wood of trees we use for lumber.
Définition : This organism produces this material or substance, either during its life or after death. A produces B if some process that occurs in A has output B.
Définition : A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)
Les environnements dans lesquels beaucoup d’espèces de Cycadales sont connues pour y vivre. Sélectionner un environnement pour voir sa liste de contrôle d’espèces de Cycadales.
Habitats de Cycadales
Les environnements dans lesquels beaucoup d’espèces de Cycadales sont connues pour y vivre. Sélectionner un environnement pour voir sa liste de contrôle d’espèces de Cycadales.
